//打乱顺序返回
export const answerConvert = index => {
    switch (index) {
        case 0: return 'A'; break;
        case 1: return 'B'; break;
        case 2: return 'C'; break;
        case 3: return 'D'; break;
        case 4: return 'E'; break;
        case 5: return 'F'; break;
        case 6: return 'G'; break;
        default: return ''; break;
    }
}